Wall construction and securing means therefor



Oct. 24, 1933. THOMSON 1,932,358

WALL CONSTRUCTION AND SECURING MEANS THEREFOR Filed March 10, 1950 Fig.4.

INVENT I GEORGE M.THOMS BY ATTORNEYS.

' head and barbs or serra Patented Got. 24, 1933 FATE WALL o George Miller Thorns Canada, assignor to bastine, Canada,

Canada Application March 10,

2 Claims.

This invention relates to the securing of wall board to a support such as the wooden studding of a building, and is more particularly applicable to the securing of wall board of the type consisting of a paper-covered core of cementitious material, such as gypsum.

It is customary to hold such boards in place by means of nails having a cylindrical shank, pointed at one end and provided with a thin, circular,

flat head atthe other end the shank being formed, throughout the whole or a major portion of its length with projecting ribs intended to cause the nail to be anchored more firmly in the studding or other support.

I, This method of securing wall boards has several disadvantages which are obviated by the present invention, according to which. the boards are secured in position on an improved nail having a tapering or conical tions directed baclwardly towards the head. The barbs or serrations are preferably confined to that portion of the shank which is adapted to enter the wooden or other support.

The advantages of compared with customary prac scribed hereinafter.

The invention consists in the features, construction and arrangement of parts hereinafter described and more particularly pointed out in the appended claims.

Referring now to the accompanying drawing, which illustrates, by way of example, one convenient embodiment of the invention,-

Figure 1 is a sectional view showing the form of nail ordinarily employed for the purpose described;

Figure 2 is a similar view illustrating the use of the improved nail;

Figure 3 is a section on line 3-3 of Figure 2;

Figure 4 is a view similar to Figure 8, showing a modified arrangement of barbs, and

Figure 5 is a fragmentary illustrating a modified form of nail head.

5 The numeral 1 indicates the paper liners and 2 the cementitious core of the wall board or lath, while the wooden studding or other support is indicated at 3.

The ordinary tice will be deform of nail, shown in Figure l, 1 comprises a cylindrical shank l, pointed at the end 5 and formed with a thin, fiat, circular head 6 at the other end. The shank is also formed with two series of projecting ribs 7 extending partially round the shank. When a nail of this 55, type is hammered through the wall board and Lim the support by means of the present invention as sectional elevation I on, Caledonia,

into the support outer surface of surface of the wall boar outer paper liner at 8.

innate ONSTRUCTIQN AND SECURING MEANS THEREFOR Ontario, ypsum, Lime, and Alaited, Paris, Ontario,

0. Serial No. 434,788

3 it the head 6 ilushw paper disc 9 to be detached and pressed core 2, and the core 2 and pre Moreover, the reaction. 0 to the force applied there a direction parallel to the a (see arrows 10),

of the wall at the unsuppor the studding is liable to cause drawn from the support 3 longer securely held in p According to the presen 2) the nail comp erably substantially cylind with the usual pointed en however, is of co from the outer surface of t minimum thickness, to the shan ably in the form conical surface arrang mately 45 with Y of the head. This arrangeme portion of t y rise up to by the hea xis of the bration or ted points the nail to so that the he supp and any vi lace on t rises a sh rical, and is d 12. The nsiderable cone h le of of a truncated ed at an ang respect to t nt possesse two important advantages.

Firstly, the nai face 14 is flush w without tearing the paper ated in Figure'l.

and the paper imme- 9 manner illustr perforates diately surrounding tightly between t ensuring that the outer paper break away from the paper at 15,

en in until ce of 1 can be driv ith the outer surfa The the perforation is he head 13 the core 2.

d on

of the arrows 16,

arrows 10 in Figure 1.

Moreover, the displaced in a vertically, thus per of the displaced the exposed surf 1'7 are provided may be arrange portion lateral por aces of e nails to ndi the barbs or s on the shank 11. d in two series, parti and the cor liner 1 cannot FlQEF into the he core under the d. The edge of the line 8 is thus not from the d 6 is in shank 4 bending between D be with- 5 board is no orts.

t invention (see Figure anl: 11, which is prefprovided head 13,

0 aving its approxihe outer surface 14 s at least the. surthe wall 1 in the objectionable point 12 clamped e 2, thus the'head which is le to the withdrawal of the indicated by the of the core affected is direction rather than initting the accommodation tion without alteration of the board. The invenbles the board to resist more be with- I ng of the board.

errations These barbs rounding the shank as indicated in Figures 2 and 3, or may be disposed in three series as illustrated in Figure 4. Each barb may extend com pletely around the shank, if desired, or any other arrangement may be adopted, to ensure that at least some of the barbs will always be favourably disposed for engagement under the unbroken parts of the fibre of the wood when the nail is driven into the support 3.

It will be seen that the upper ribs 7, shown in Figure 1, do not perform any useful function, and according to the present invention the barbs 17 are confined to that portion of the nail which engages the support 3. Preferably the cylindrical portion immediately adjacent the pointed end 12 is devoid of barbs so that the nail may be accurately directed into the support 3 before any barbs come into engagement with the support. Thus owing to the evenly tapered or pointed end and the absence of barbs or serrations adjacent this portion of the nail, the tendency for the nail to be accidentally driven into the wall at an angle other than a right angle is largely overcome.

While the under surface of the head 13 is preferably conical, this shape is not essential. The surface must taper gradually but not necessarily uniformly. For example, it might be concave, as indicated in Figure 5. The term conical as employed in the claims is intended to include any such tion.

I claim:

1. In combination, a wall board of the kind comprising a cementitious core and paper liners adhering to said core; a support; a nail shank anchored in said support and a tapered head integral with said shank, a portion of the outer paper liner being clamped between the tapered surface of said head and said core, and said head having a fiat, outer surface in a plane at right angles to said shank substantially flush with the outer face of the wall board and meeting said tapered surface at a sharp, circular edge.

2. In combination, a wall board of the kind comprising a cementitious core and paper liners adhering to said core; a support; a nail shank anchored in said support and a conical head integral with said shank, a portion of the outer paper liner being clamped between the conical surface of said head and said core, and said head having a flat, outer surface of large diamegradually tapering formater in relation to the diameter of the shank and the conical surface of the head being arranged at an angle of substantially 45 with respect to the shank and terminating at its larger end in a sharp, circular edge.

GEORGE MILLER THOMSON.

lilo 

